/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#include "itkQuadEdgeMesh.h"
#include "itkMeshFileReader.h"

#include "itkQuadEdgeMeshExtendedTraits.h"
#include "itkNormalQuadEdgeMeshFilter.h"

int itkNormalQuadEdgeMeshFilterTest( int argc, char* argv[] )
{
  if( argc < 2 )
    {
    std::cout <<"This program requires at least 1 argument" <<std::endl;
    std::cout <<"1- Input filename" <<std::endl;
    std::cout <<"2- Weight type" <<std::endl;
    std::cout <<"   * 0:  GOURAUD" <<std::endl;
    std::cout <<"   * 1:  THURMER" <<std::endl;
    std::cout <<"   * 2:  AREA" <<std::endl;
    return EXIT_FAILURE;
    }

  constexpr unsigned int Dimension = 3;
  using CoordType = double;

  using InputMeshType = itk::QuadEdgeMesh< CoordType, Dimension >;

  using VectorType = itk::Vector< CoordType, Dimension >;

  using Traits = itk::QuadEdgeMeshExtendedTraits <
    VectorType, Dimension, 2,
    CoordType, CoordType, VectorType, bool, bool >;

  using OutputMeshType = itk::QuadEdgeMesh < VectorType, Dimension, Traits >;

  using ReaderType = itk::MeshFileReader< InputMeshType >;
  using NormalFilterType = itk::NormalQuadEdgeMeshFilter< InputMeshType, OutputMeshType >;
  NormalFilterType::WeightType weight_type;

  int param = std::stoi( argv[2] );

  if( ( param < 0 ) || ( param > 2 ) )
    {
    std::cout <<"Weight type must be either: " <<std::endl;
    std::cout <<"   * 0:  GOURAUD" <<std::endl;
    std::cout <<"   * 1:  THURMER" <<std::endl;
    std::cout <<"   * 2:  AREA" <<std::endl;
    return EXIT_FAILURE;
    }
  else
    {
    switch( param )
      {
      default:
      case 0:
        weight_type = NormalFilterType::GOURAUD;
        break;
      case 1:
        weight_type = NormalFilterType::THURMER;
        break;
      case 2:
        weight_type = NormalFilterType::AREA;
        break;
      }
    }

  ReaderType::Pointer reader = ReaderType::New( );
  reader->SetFileName( argv[1] );

  try
    {
    reader->Update( );
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Exception thrown while reading the input file " << std::endl;
    std::cerr << excp << std::endl;
    return EXIT_FAILURE;
    }

  InputMeshType::Pointer mesh = reader->GetOutput( );

  NormalFilterType::Pointer normals = NormalFilterType::New( );
  normals->SetInput( mesh );
  normals->SetWeight( weight_type );
  normals->Update( );

  OutputMeshType::Pointer output = normals->GetOutput( );

  //
  //   FIXME
  //
  //     OutputMeshType::PointDataContainerPointer pointdata =
  //       output->GetPointData( );
  //
  //     std::cout <<"*********************************" <<endl;
  //     std::cout <<"Vertex Normal" <<endl;
  //     for( OutputMeshType::PointDataContainerIterator
  //           d_it = pointdata->Begin( );
  //          d_it != pointdata->End( );
  //          d_it++ )
  //       {
  //       std::cout <<d_it->Index( ) <<"  " <<d_it->Value( ) <<endl;
  //       }
  //
  //     std::cout <<endl;
  //     std::cout <<"*********************************" <<endl;
  //     std::cout <<"Face Normal" <<endl;
  //
  //     OutputMeshType::CellDataContainerPointer celldata =
  //       output->GetCellData( );
  //
  //
  //     for( OutputMeshType::CellDataContainerIterator
  //           n_it = celldata->Begin( );
  //          n_it != celldata->End( );
  //          n_it++ )
  //       {
  //       std::cout <<n_it->Index( ) <<"  " <<n_it->Value( ) <<endl;
  //       }

  // ** PRINT **
  std::cout << normals;
  return EXIT_SUCCESS;
}
